1#ifndef __LINUX_CPUMASK_H
2#define __LINUX_CPUMASK_H
3
4
5
6
7
8
9#include <linux/kernel.h>
10#include <linux/threads.h>
11#include <linux/bitmap.h>
12#include <linux/bug.h>
13
14typedef struct cpumask { DECLARE_BITMAP(bits, NR_CPUS); } cpumask_t;
15
16
17
18
19
20
21
22
23#define cpumask_bits(maskp) ((maskp)->bits)
24
25#if NR_CPUS == 1
26#define nr_cpu_ids 1
27#else
28extern int nr_cpu_ids;
29#endif
30
31#ifdef CONFIG_CPUMASK_OFFSTACK
32
33
34#define nr_cpumask_bits nr_cpu_ids
35#else
36#define nr_cpumask_bits NR_CPUS
37#endif
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79extern const struct cpumask *const cpu_possible_mask;
80extern const struct cpumask *const cpu_online_mask;
81extern const struct cpumask *const cpu_present_mask;
82extern const struct cpumask *const cpu_active_mask;
83
84#if NR_CPUS > 1
85#define num_online_cpus() cpumask_weight(cpu_online_mask)
86#define num_possible_cpus() cpumask_weight(cpu_possible_mask)
87#define num_present_cpus() cpumask_weight(cpu_present_mask)
88#define num_active_cpus() cpumask_weight(cpu_active_mask)
89#define cpu_online(cpu) cpumask_test_cpu((cpu), cpu_online_mask)
90#define cpu_possible(cpu) cpumask_test_cpu((cpu), cpu_possible_mask)
91#define cpu_present(cpu) cpumask_test_cpu((cpu), cpu_present_mask)
92#define cpu_active(cpu) cpumask_test_cpu((cpu), cpu_active_mask)
93#else
94#define num_online_cpus() 1U
95#define num_possible_cpus() 1U
96#define num_present_cpus() 1U
97#define num_active_cpus() 1U
98#define cpu_online(cpu) ((cpu) == 0)
99#define cpu_possible(cpu) ((cpu) == 0)
100#define cpu_present(cpu) ((cpu) == 0)
101#define cpu_active(cpu) ((cpu) == 0)
102#endif
103
104
105static inline unsigned int cpumask_check(unsigned int cpu)
106{
107#ifdef CONFIG_DEBUG_PER_CPU_MAPS
108 WARN_ON_ONCE(cpu >= nr_cpumask_bits);
109#endif
110 return cpu;
111}
112
113#if NR_CPUS == 1
114
115static inline unsigned int cpumask_first(const struct cpumask *srcp)
116{
117 return 0;
118}
119
120
121static inline unsigned int cpumask_next(int n, const struct cpumask *srcp)
122{
123 return n+1;
124}
125
126static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp)
127{
128 return n+1;
129}
130
131static inline unsigned int cpumask_next_and(int n,
132 const struct cpumask *srcp,
133 const struct cpumask *andp)
134{
135 return n+1;
136}
137
138
139static inline unsigned int cpumask_any_but(const struct cpumask *mask,
140 unsigned int cpu)
141{
142 return 1;
143}
144
145#define for_each_cpu(cpu, mask) \
146 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
147#define for_each_cpu_not(cpu, mask) \
148 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
149#define for_each_cpu_and(cpu, mask, and) \
150 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask, (void)and)
151#else
152
153
154
155
156
157
158static inline unsigned int cpumask_first(const struct cpumask *srcp)
159{
160 return find_first_bit(cpumask_bits(srcp), nr_cpumask_bits);
161}
162
163
164
165
166
167
168
169
170static inline unsigned int cpumask_next(int n, const struct cpumask *srcp)
171{
172
173 if (n != -1)
174 cpumask_check(n);
175 return find_next_bit(cpumask_bits(srcp), nr_cpumask_bits, n+1);
176}
177
178
179
180
181
182
183
184
185static inline unsigned int cpumask_next_zero(int n, const struct cpumask *srcp)
186{
187
188 if (n != -1)
189 cpumask_check(n);
190 return find_next_zero_bit(cpumask_bits(srcp), nr_cpumask_bits, n+1);
191}
192
193int cpumask_next_and(int n, const struct cpumask *, const struct cpumask *);
194int cpumask_any_but(const struct cpumask *mask, unsigned int cpu);
195
196
197
198
199
200
201
202
203#define for_each_cpu(cpu, mask) \
204 for ((cpu) = -1; \
205 (cpu) = cpumask_next((cpu), (mask)), \
206 (cpu) < nr_cpu_ids;)
207
208
209
210
211
212
213
214
215#define for_each_cpu_not(cpu, mask) \
216 for ((cpu) = -1; \
217 (cpu) = cpumask_next_zero((cpu), (mask)), \
218 (cpu) < nr_cpu_ids;)
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234#define for_each_cpu_and(cpu, mask, and) \
235 for ((cpu) = -1; \
236 (cpu) = cpumask_next_and((cpu), (mask), (and)), \
237 (cpu) < nr_cpu_ids;)
238#endif
239
240#define CPU_BITS_NONE \
241{ \
242 [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \
243}
244
245#define CPU_BITS_CPU0 \
246{ \
247 [0] = 1UL \
248}
249
250
251
252
253
254
255static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp)
256{
257 set_bit(cpumask_check(cpu), cpumask_bits(dstp));
258}
259
260
261
262
263
264
265static inline void cpumask_clear_cpu(int cpu, struct cpumask *dstp)
266{
267 clear_bit(cpumask_check(cpu), cpumask_bits(dstp));
268}
269
270
271
272
273
274
275
276
277
278
279#define cpumask_test_cpu(cpu, cpumask) \
280 test_bit(cpumask_check(cpu), cpumask_bits((cpumask)))
281
282
283
284
285
286
287
288
289
290
291static inline int cpumask_test_and_set_cpu(int cpu, struct cpumask *cpumask)
292{
293 return test_and_set_bit(cpumask_check(cpu), cpumask_bits(cpumask));
294}
295
296
297
298
299
300
301
302
303
304
305static inline int cpumask_test_and_clear_cpu(int cpu, struct cpumask *cpumask)
306{
307 return test_and_clear_bit(cpumask_check(cpu), cpumask_bits(cpumask));
308}
309
310
311
312
313
314static inline void cpumask_setall(struct cpumask *dstp)
315{
316 bitmap_fill(cpumask_bits(dstp), nr_cpumask_bits);
317}
318
319
320
321
322
323static inline void cpumask_clear(struct cpumask *dstp)
324{
325 bitmap_zero(cpumask_bits(dstp), nr_cpumask_bits);
326}
327
328
329
330
331
332
333
334
335
336static inline int cpumask_and(struct cpumask *dstp,
337 const struct cpumask *src1p,
338 const struct cpumask *src2p)
339{
340 return bitmap_and(cpumask_bits(dstp), cpumask_bits(src1p),
341 cpumask_bits(src2p), nr_cpumask_bits);
342}
343
344
345
346
347
348
349
350static inline void cpumask_or(struct cpumask *dstp, const struct cpumask *src1p,
351 const struct cpumask *src2p)
352{
353 bitmap_or(cpumask_bits(dstp), cpumask_bits(src1p),
354 cpumask_bits(src2p), nr_cpumask_bits);
355}
356
357
358
359
360
361
362
363static inline void cpumask_xor(struct cpumask *dstp,
364 const struct cpumask *src1p,
365 const struct cpumask *src2p)
366{
367 bitmap_xor(cpumask_bits(dstp), cpumask_bits(src1p),
368 cpumask_bits(src2p), nr_cpumask_bits);
369}
370
371
372
373
374
375
376
377
378
379static inline int cpumask_andnot(struct cpumask *dstp,
380 const struct cpumask *src1p,
381 const struct cpumask *src2p)
382{
383 return bitmap_andnot(cpumask_bits(dstp), cpumask_bits(src1p),
384 cpumask_bits(src2p), nr_cpumask_bits);
385}
386
387
388
389
390
391
392static inline void cpumask_complement(struct cpumask *dstp,
393 const struct cpumask *srcp)
394{
395 bitmap_complement(cpumask_bits(dstp), cpumask_bits(srcp),
396 nr_cpumask_bits);
397}
398
399
400
401
402
403
404static inline bool cpumask_equal(const struct cpumask *src1p,
405 const struct cpumask *src2p)
406{
407 return bitmap_equal(cpumask_bits(src1p), cpumask_bits(src2p),
408 nr_cpumask_bits);
409}
410
411
412
413
414
415
416static inline bool cpumask_intersects(const struct cpumask *src1p,
417 const struct cpumask *src2p)
418{
419 return bitmap_intersects(cpumask_bits(src1p), cpumask_bits(src2p),
420 nr_cpumask_bits);
421}
422
423
424
425
426
427
428
429
430static inline int cpumask_subset(const struct cpumask *src1p,
431 const struct cpumask *src2p)
432{
433 return bitmap_subset(cpumask_bits(src1p), cpumask_bits(src2p),
434 nr_cpumask_bits);
435}
436
437
438
439
440
441static inline bool cpumask_empty(const struct cpumask *srcp)
442{
443 return bitmap_empty(cpumask_bits(srcp), nr_cpumask_bits);
444}
445
446
447
448
449
450static inline bool cpumask_full(const struct cpumask *srcp)
451{
452 return bitmap_full(cpumask_bits(srcp), nr_cpumask_bits);
453}
454
455
456
457
458
459static inline unsigned int cpumask_weight(const struct cpumask *srcp)
460{
461 return bitmap_weight(cpumask_bits(srcp), nr_cpumask_bits);
462}
463
464
465
466
467
468
469
470static inline void cpumask_shift_right(struct cpumask *dstp,
471 const struct cpumask *srcp, int n)
472{
473 bitmap_shift_right(cpumask_bits(dstp), cpumask_bits(srcp), n,
474 nr_cpumask_bits);
475}
476
477
478
479
480
481
482
483static inline void cpumask_shift_left(struct cpumask *dstp,
484 const struct cpumask *srcp, int n)
485{
486 bitmap_shift_left(cpumask_bits(dstp), cpumask_bits(srcp), n,
487 nr_cpumask_bits);
488}
489
490
491
492
493
494
495static inline void cpumask_copy(struct cpumask *dstp,
496 const struct cpumask *srcp)
497{
498 bitmap_copy(cpumask_bits(dstp), cpumask_bits(srcp), nr_cpumask_bits);
499}
500
501
502
503
504
505
506
507#define cpumask_any(srcp) cpumask_first(srcp)
508
509
510
511
512
513
514
515
516#define cpumask_first_and(src1p, src2p) cpumask_next_and(-1, (src1p), (src2p))
517
518
519
520
521
522
523
524
525#define cpumask_any_and(mask1, mask2) cpumask_first_and((mask1), (mask2))
526
527
528
529
530
531#define cpumask_of(cpu) (get_cpu_mask(cpu))
532
533
534
535
536
537
538
539
540
541
542static inline int cpumask_scnprintf(char *buf, int len,
543 const struct cpumask *srcp)
544{
545 return bitmap_scnprintf(buf, len, cpumask_bits(srcp), nr_cpumask_bits);
546}
547
548
549
550
551
552
553
554
555
556static inline int cpumask_parse_user(const char __user *buf, int len,
557 struct cpumask *dstp)
558{
559 return bitmap_parse_user(buf, len, cpumask_bits(dstp), nr_cpumask_bits);
560}
561
562
563
564
565
566
567
568
569
570static inline int cpumask_parselist_user(const char __user *buf, int len,
571 struct cpumask *dstp)
572{
573 return bitmap_parselist_user(buf, len, cpumask_bits(dstp),
574 nr_cpumask_bits);
575}
576
577
578
579
580
581
582
583
584
585
586static inline int cpulist_scnprintf(char *buf, int len,
587 const struct cpumask *srcp)
588{
589 return bitmap_scnlistprintf(buf, len, cpumask_bits(srcp),
590 nr_cpumask_bits);
591}
592
593
594
595
596
597
598
599
600static inline int cpumask_parse(const char *buf, struct cpumask *dstp)
601{
602 char *nl = strchr(buf, '\n');
603 int len = nl ? nl - buf : strlen(buf);
604
605 return bitmap_parse(buf, len, cpumask_bits(dstp), nr_cpumask_bits);
606}
607
608
609
610
611
612
613
614
615static inline int cpulist_parse(const char *buf, struct cpumask *dstp)
616{
617 return bitmap_parselist(buf, cpumask_bits(dstp), nr_cpumask_bits);
618}
619
620
621
622
623
624
625static inline size_t cpumask_size(void)
626{
627
628
629 return BITS_TO_LONGS(NR_CPUS) * sizeof(long);
630}
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662#ifdef CONFIG_CPUMASK_OFFSTACK
663typedef struct cpumask *cpumask_var_t;
664
665bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node);
666bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags);
667bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node);
668bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags);
669void alloc_bootmem_cpumask_var(cpumask_var_t *mask);
670void free_cpumask_var(cpumask_var_t mask);
671void free_bootmem_cpumask_var(cpumask_var_t mask);
672
673#else
674typedef struct cpumask cpumask_var_t[1];
675
676static inline bool alloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
677{
678 return true;
679}
680
681static inline bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags,
682 int node)
683{
684 return true;
685}
686
687static inline bool zalloc_cpumask_var(cpumask_var_t *mask, gfp_t flags)
688{
689 cpumask_clear(*mask);
690 return true;
691}
692
693static inline bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags,
694 int node)
695{
696 cpumask_clear(*mask);
697 return true;
698}
699
700static inline void alloc_bootmem_cpumask_var(cpumask_var_t *mask)
701{
702}
703
704static inline void free_cpumask_var(cpumask_var_t mask)
705{
706}
707
708static inline void free_bootmem_cpumask_var(cpumask_var_t mask)
709{
710}
711#endif
712
713
714
715extern const DECLARE_BITMAP(cpu_all_bits, NR_CPUS);
716#define cpu_all_mask to_cpumask(cpu_all_bits)
717
718
719#define cpu_none_mask to_cpumask(cpu_bit_bitmap[0])
720
721#define for_each_possible_cpu(cpu) for_each_cpu((cpu), cpu_possible_mask)
722#define for_each_online_cpu(cpu) for_each_cpu((cpu), cpu_online_mask)
723#define for_each_present_cpu(cpu) for_each_cpu((cpu), cpu_present_mask)
724
725
726void set_cpu_possible(unsigned int cpu, bool possible);
727void set_cpu_present(unsigned int cpu, bool present);
728void set_cpu_online(unsigned int cpu, bool online);
729void set_cpu_active(unsigned int cpu, bool active);
730void init_cpu_present(const struct cpumask *src);
731void init_cpu_possible(const struct cpumask *src);
732void init_cpu_online(const struct cpumask *src);
733
734
735
736
737
738
739
740
741
742
743
744#define to_cpumask(bitmap) \
745 ((struct cpumask *)(1 ? (bitmap) \
746 : (void *)sizeof(__check_is_bitmap(bitmap))))
747
748static inline int __check_is_bitmap(const unsigned long *bitmap)
749{
750 return 1;
751}
752
753
754
755
756
757
758
759
760extern const unsigned long
761 cpu_bit_bitmap[BITS_PER_LONG+1][BITS_TO_LONGS(NR_CPUS)];
762
763static inline const struct cpumask *get_cpu_mask(unsigned int cpu)
764{
765 const unsigned long *p = cpu_bit_bitmap[1 + cpu % BITS_PER_LONG];
766 p -= cpu / BITS_PER_LONG;
767 return to_cpumask(p);
768}
769
770#define cpu_is_offline(cpu) unlikely(!cpu_online(cpu))
771
772#if NR_CPUS <= BITS_PER_LONG
773#define CPU_BITS_ALL \
774{ \
775 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
776}
777
778#else
779
780#define CPU_BITS_ALL \
781{ \
782 [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
783 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
784}
785#endif
786
787
788
789
790
791
792#ifndef CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
793#define cpumask_of_cpu(cpu) (*get_cpu_mask(cpu))
794
795#define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS)
796
797#if NR_CPUS <= BITS_PER_LONG
798
799#define CPU_MASK_ALL \
800(cpumask_t) { { \
801 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
802} }
803
804#else
805
806#define CPU_MASK_ALL \
807(cpumask_t) { { \
808 [0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL, \
809 [BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD \
810} }
811
812#endif
813
814#define CPU_MASK_NONE \
815(cpumask_t) { { \
816 [0 ... BITS_TO_LONGS(NR_CPUS)-1] = 0UL \
817} }
818
819#define CPU_MASK_CPU0 \
820(cpumask_t) { { \
821 [0] = 1UL \
822} }
823
824#if NR_CPUS == 1
825#define first_cpu(src) ({ (void)(src); 0; })
826#define next_cpu(n, src) ({ (void)(src); 1; })
827#define any_online_cpu(mask) 0
828#define for_each_cpu_mask(cpu, mask) \
829 for ((cpu) = 0; (cpu) < 1; (cpu)++, (void)mask)
830#else
831int __first_cpu(const cpumask_t *srcp);
832int __next_cpu(int n, const cpumask_t *srcp);
833
834#define first_cpu(src) __first_cpu(&(src))
835#define next_cpu(n, src) __next_cpu((n), &(src))
836#define any_online_cpu(mask) cpumask_any_and(&mask, cpu_online_mask)
837#define for_each_cpu_mask(cpu, mask) \
838 for ((cpu) = -1; \
839 (cpu) = next_cpu((cpu), (mask)), \
840 (cpu) < NR_CPUS; )
841#endif
842
843#if NR_CPUS <= 64
844
845#define for_each_cpu_mask_nr(cpu, mask) for_each_cpu_mask(cpu, mask)
846
847#else
848
849int __next_cpu_nr(int n, const cpumask_t *srcp);
850#define for_each_cpu_mask_nr(cpu, mask) \
851 for ((cpu) = -1; \
852 (cpu) = __next_cpu_nr((cpu), &(mask)), \
853 (cpu) < nr_cpu_ids; )
854
855#endif
856
857#define cpus_addr(src) ((src).bits)
858
859#define cpu_set(cpu, dst) __cpu_set((cpu), &(dst))
860static inline void __cpu_set(int cpu, volatile cpumask_t *dstp)
861{
862 set_bit(cpu, dstp->bits);
863}
864
865#define cpu_clear(cpu, dst) __cpu_clear((cpu), &(dst))
866static inline void __cpu_clear(int cpu, volatile cpumask_t *dstp)
867{
868 clear_bit(cpu, dstp->bits);
869}
870
871#define cpus_setall(dst) __cpus_setall(&(dst), NR_CPUS)
872static inline void __cpus_setall(cpumask_t *dstp, int nbits)
873{
874 bitmap_fill(dstp->bits, nbits);
875}
876
877#define cpus_clear(dst) __cpus_clear(&(dst), NR_CPUS)
878static inline void __cpus_clear(cpumask_t *dstp, int nbits)
879{
880 bitmap_zero(dstp->bits, nbits);
881}
882
883
884#define cpu_isset(cpu, cpumask) test_bit((cpu), (cpumask).bits)
885
886#define cpu_test_and_set(cpu, cpumask) __cpu_test_and_set((cpu), &(cpumask))
887static inline int __cpu_test_and_set(int cpu, cpumask_t *addr)
888{
889 return test_and_set_bit(cpu, addr->bits);
890}
891
892#define cpus_and(dst, src1, src2) __cpus_and(&(dst), &(src1), &(src2), NR_CPUS)
893static inline int __cpus_and(cpumask_t *dstp, const cpumask_t *src1p,
894 const cpumask_t *src2p, int nbits)
895{
896 return bitmap_and(dstp->bits, src1p->bits, src2p->bits, nbits);
897}
898
899#define cpus_or(dst, src1, src2) __cpus_or(&(dst), &(src1), &(src2), NR_CPUS)
900static inline void __cpus_or(cpumask_t *dstp, const cpumask_t *src1p,
901 const cpumask_t *src2p, int nbits)
902{
903 bitmap_or(dstp->bits, src1p->bits, src2p->bits, nbits);
904}
905
906#define cpus_xor(dst, src1, src2) __cpus_xor(&(dst), &(src1), &(src2), NR_CPUS)
907static inline void __cpus_xor(cpumask_t *dstp, const cpumask_t *src1p,
908 const cpumask_t *src2p, int nbits)
909{
910 bitmap_xor(dstp->bits, src1p->bits, src2p->bits, nbits);
911}
912
913#define cpus_andnot(dst, src1, src2) \
914 __cpus_andnot(&(dst), &(src1), &(src2), NR_CPUS)
915static inline int __cpus_andnot(cpumask_t *dstp, const cpumask_t *src1p,
916 const cpumask_t *src2p, int nbits)
917{
918 return bitmap_andnot(dstp->bits, src1p->bits, src2p->bits, nbits);
919}
920
921#define cpus_equal(src1, src2) __cpus_equal(&(src1), &(src2), NR_CPUS)
922static inline int __cpus_equal(const cpumask_t *src1p,
923 const cpumask_t *src2p, int nbits)
924{
925 return bitmap_equal(src1p->bits, src2p->bits, nbits);
926}
927
928#define cpus_intersects(src1, src2) __cpus_intersects(&(src1), &(src2), NR_CPUS)
929static inline int __cpus_intersects(const cpumask_t *src1p,
930 const cpumask_t *src2p, int nbits)
931{
932 return bitmap_intersects(src1p->bits, src2p->bits, nbits);
933}
934
935#define cpus_subset(src1, src2) __cpus_subset(&(src1), &(src2), NR_CPUS)
936static inline int __cpus_subset(const cpumask_t *src1p,
937 const cpumask_t *src2p, int nbits)
938{
939 return bitmap_subset(src1p->bits, src2p->bits, nbits);
940}
941
942#define cpus_empty(src) __cpus_empty(&(src), NR_CPUS)
943static inline int __cpus_empty(const cpumask_t *srcp, int nbits)
944{
945 return bitmap_empty(srcp->bits, nbits);
946}
947
948#define cpus_weight(cpumask) __cpus_weight(&(cpumask), NR_CPUS)
949static inline int __cpus_weight(const cpumask_t *srcp, int nbits)
950{
951 return bitmap_weight(srcp->bits, nbits);
952}
953
954#define cpus_shift_left(dst, src, n) \
955 __cpus_shift_left(&(dst), &(src), (n), NR_CPUS)
956static inline void __cpus_shift_left(cpumask_t *dstp,
957 const cpumask_t *srcp, int n, int nbits)
958{
959 bitmap_shift_left(dstp->bits, srcp->bits, n, nbits);
960}
961#endif
962
963#endif
964